As the ground shook from a 5.2-magnitude earthquake, a herd of elephants at the San Diego Zoo Safari Park sprung into action to protect their young. A video shot of their enclosure at the park Monday morning shows the five African elephants standing around in the morning sun before the camera shakes and they run in different directions.

When a 5.2 earthquake hit near San Diego, the San Diego Zoo Safari Park caught its elephants on video taking action to protect their young, forming what experts call an "alert circle."